<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2017/10/19
  Time: 8:31
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<%request.setAttribute("key",null);%>
<%--<c:out value=${key} default="guo"></c:out>--%>
<c:out value="${key}">
    guo
</c:out>
</body>
</html>
